Excited for the new release, but seeing some hangs

Scott Persinger

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Feb 8, 2025, 8:13:13 AMFeb 8

to thespian.py

Hi Kevin -

I am excited to get onto the new 4.0 release. Generally its working well. This morning however I seemed to have gotten into a sate where something is blocking multiprocTCPBase from starting up. FWIW my code at the moment is calling asys.shutdown() whenever it closes, but I'm probably applying more startup/shutdown than would be normal.

If I ctrl-c my process I get this stack trace:

File "/Users/scottp/src/agentic/src/agentic/actor_agents.py", line 570, in _init_base_actor

asys.ask(

File "/Users/scottp/src/agentic/.venv/lib/python3.11/site-packages/thespian/actors.py", line 738, in ask

return self._systemBase.ask(actorAddr, msg, timeout)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Users/scottp/src/agentic/.venv/lib/python3.11/site-packages/thespian/system/systemBase.py", line 264, in ask

response = self._run_transport(remTime.remaining())

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Users/scottp/src/agentic/.venv/lib/python3.11/site-packages/thespian/system/systemBase.py", line 139, in _run_transport

r = self.transport.run(TransmitOnly if txonly else incomingHandler,

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Users/scottp/src/agentic/.venv/lib/python3.11/site-packages/thespian/system/transport/wakeupTransportBase.py", line 71, in run

rval = self._run_subtransport(incomingHandler, max_runtime)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Users/scottp/src/agentic/.venv/lib/python3.11/site-packages/thespian/system/transport/wakeupTransportBase.py", line 80, in _run_subtransport

rval = self._runWithExpiry(incomingHandler)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Users/scottp/src/agentic/.venv/lib/python3.11/site-packages/thespian/system/transport/TCPTransport.py", line 1158, in _runWithExpiry

events = sel.select(delay)

^^^^^^^^^^^^^^^^^

File "/opt/homebrew/Cellar/pyt...@3.11/3.11.9/Frameworks/Python.framework/Versions/3.11/lib/python3.11/selectors.py", line 566, in select

kev_list = self._selector.control(None, max_ev, timeout)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

So this is after I call:

asys = ActorSystem("multiprocTCPBase")
but the first message I try to send to the system. Any tips for debugging would be greatly appreciated!

--scott

Kevin Quick

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Feb 8, 2025, 10:56:29 AMFeb 8

to Scott Persinger, thespian.py

Hello Scott,

Thanks for the report. I'd recommend trying two things: (1) can you try this with the older version of Thespian to see if it is able to start successfully, and (2) can you check to see if there is an `ActorAdmin` process still running somewhere that might have become unresponsive to the shutdown requests; if you find one, kill it manually and then try running with the 4/0 release.

-Kevin

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Scott Persinger

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Feb 8, 2025, 2:24:44 PMFeb 8

to thespian.py

So no great luck. I can't see any evidence of other processes still running.

This is 4.0. No other python processes running:

(agentic) (base) scottp@MacBook-Air agentic % ps -ef | grep Admin

501 40502 3256 0 2:09pm ttys001 0:00.00 grep Admin

(agentic) (base) scottp@MacBook-Air agentic % ps -ef | grep python

501 40512 3256 0 2:09pm ttys001 0:00.00 grep python

(agentic) (base) scottp@MacBook-Air agentic %

(agentic) (base) scottp@MacBook-Air agentic % agentic repl examples/news_demo.py

Traceback (most recent call last):

File "/Users/scottp/src/agentic/src/agentic/repl.py", line 82, in load_agent

spec.loader.exec_module(module)

File "<frozen importlib._bootstrap_external>", line 940, in exec_module

File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed

File "/Users/scottp/src/agentic/examples/news_demo.py", line 41, in <module>

reporter = Agent(

^^^^^^

File "/Users/scottp/src/agentic/src/agentic/actor_agents.py", line 579, in __init__

self._init_base_actor(instructions)

File "/Users/scottp/src/agentic/src/agentic/actor_agents.py", line 605, in _init_base_actor

asys.ask(

File "/Users/scottp/src/agentic/.venv/lib/python3.11/site-packages/thespian/actors.py", line 738, in ask

return self._systemBase.ask(actorAddr, msg, timeout)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Users/scottp/src/agentic/.venv/lib/python3.11/site-packages/thespian/system/systemBase.py", line 273, in ask

raise ActorSystemFailure('Transmit of ask message to %s failed (%s)'%(

thespian.actors.ActorSystemFailure: Transmit of ask message to ActorAddr-(T|:52998) failed (-BadPacketError)

----------

Then I downgraded to prior version:

(agentic) (base) scottp@MacBook-Air agentic % uv pip install thespian==3.10.7

Resolved 1 package in 108ms

Uninstalled 1 package in 10ms

Installed 1 package in 3ms

- thespian==4.0.0

+ thespian==3.10.7

(agentic) (base) scottp@MacBook-Air agentic % agentic repl examples/news_demo.py

Traceback (most recent call last):

File "/Users/scottp/src/agentic/src/agentic/repl.py", line 53, in <module>

CURRENT_RUNNER: AgentRunner = AgentRunner(Agent(name="", instructions=""))

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Users/scottp/src/agentic/src/agentic/actor_agents.py", line 579, in __init__

self._init_base_actor(instructions)

File "/Users/scottp/src/agentic/src/agentic/actor_agents.py", line 586, in _init_base_actor

asys, logger = create_actor_system()

^^^^^^^^^^^^^^^^^^^^^

File "/Users/scottp/src/agentic/src/agentic/actor_agents.py", line 515, in create_actor_system

asys = ActorSystem("multiprocTCPBase")

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Users/scottp/src/agentic/.venv/lib/python3.11/site-packages/thespian/actors.py", line 637, in __init__

systemBase = self._startupActorSys(

^^^^^^^^^^^^^^^^^^^^^^

File "/Users/scottp/src/agentic/.venv/lib/python3.11/site-packages/thespian/actors.py", line 678, in _startupActorSys

systemBase = sbc(self, logDefs=logDefs)

^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Users/scottp/src/agentic/.venv/lib/python3.11/site-packages/thespian/system/multiprocTCPBase.py", line 28, in __init__

super(ActorSystemBase, self).__init__(system, logDefs)

File "/Users/scottp/src/agentic/.venv/lib/python3.11/site-packages/thespian/system/multiprocCommon.py", line 83, in __init__

super(multiprocessCommon, self).__init__(system, logDefs)

File "/Users/scottp/src/agentic/.venv/lib/python3.11/site-packages/thespian/system/systemBase.py", line 326, in __init__

self._startAdmin(self.adminAddr,

File "/Users/scottp/src/agentic/.venv/lib/python3.11/site-packages/thespian/system/multiprocCommon.py", line 115, in _startAdmin

raise InvalidActorAddress(adminAddr,

thespian.actors.InvalidActorAddress: ActorAddr-(T|:1900) is not a valid ActorSystem admin

-------------

Scott Persinger

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Feb 8, 2025, 2:40:49 PMFeb 8

to thespian.py

Ok after reboot, and then setting THESPIAN_BASE_IPADDR=127.0.0.1

(agentic) (base) scottp@MacBook-Air agentic % python examples/basic_agent.py

WARNING:root:Unable to get address info for address 1.0.0.127.in-addr.arpa (2, 2, 17, 0): <class 'socket.gaierror'> [Errno 8] nodename nor servname provided, or not known

WARNING:root:Unable to get address info for address 1.0.0.127.in-addr.arpa (2, 2, 17, 1): <class 'socket.gaierror'> [Errno 8] nodename nor servname provided, or not known

I am a simple agent here to help. I have a single weather function.

press <enter> to quit

> ^D

Exiting REPL.

(agentic) (base) scottp@MacBook-Air agentic %

(agentic) (base) scottp@MacBook-Air agentic % export THESPIAN_BASE_IPADDR=127.0.0.1

now it works. I've changed my code to not call "shutdown", so hopefully leaving up the Admin will make it happier.

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